body {
  line-height: 1.5;
  background: url(../images/header.jpg);
  color: white;
  font-family: "microsoft yahei";
  /* 以下代码为全屏图片的实现方式，请勿改动 */
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}


.container {
  width: 50%;
  background: rgba(0,0,0,0.5);
  margin:30px;
  padding: 10px;
  border-radius: 10px;
}

a{
  color: #5780FF;
  text-decoration: none;
}

h1{
  font-size: 50px;
}

h2{
  margin-top: -30px;
  font-size: 1.5em;
}